<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>position</title>
    <style>
        .box1{
            width: 200px;
            height: 200px;
            background-color: aqua;
        }
        .box2{
            width: 200px;
            height: 200px;
            background-color: red;
            position: relative;
            top:-200px;
            left: 100px;
        }
        .box3{
            width: 200px;
            height: 200px;
            background-color: rosybrown;
        }
    </style>
</head>
<body>
    <div class="box1">1</div>
    <div class="box2">2</div>
    <div class="box3">3</div>
</body>
</html>